Class 2 circuits used in environmental spaces air must be marked with which designation?

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Multiple Choice

Class 2 circuits used in environmental spaces air must be marked with which designation?

Explanation:
Plenum-rated jackets are required for cables used in air-handling or environmental spaces. The designation that includes a P signals a Class 2 power-limited circuit with a plenum rating, meaning the cable jacket is approved for use in spaces where air is circulated and where fire safety and smoke/toxicity limits are stricter. This makes it the appropriate choice for environments that are part of the building’s air distribution system. The other designations indicate Class 2 cables with different restrictions but do not indicate plenums, so they aren’t suitable for those spaces.

Plenum-rated jackets are required for cables used in air-handling or environmental spaces. The designation that includes a P signals a Class 2 power-limited circuit with a plenum rating, meaning the cable jacket is approved for use in spaces where air is circulated and where fire safety and smoke/toxicity limits are stricter. This makes it the appropriate choice for environments that are part of the building’s air distribution system. The other designations indicate Class 2 cables with different restrictions but do not indicate plenums, so they aren’t suitable for those spaces.

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